Gateway monument



FIG. 1 is a top, front, left side perspective of a gateway monument;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is an enlarged top plan view thereof; and,

FIG. 7 is an enlarge bottom plan view thereof. 

CLAIM The ornamental design for a gateway monument, as shown and described. 